Heating-stove.



J. A. JENSEN.l

HEATING STOVE.

APPLICATION FILED JAN. 16 1899.

UNITED STATES Patented July 18, 1905.

JESS ADOLPH JENSEN, OF COPENHAGEN, DENMARK.

H EATI NG-STOVE.

SPECIFICATION fOlmng part 0f Letters Patent N0. 795,226, dated July 18,1905.

Application filed January 16, 1899. Serial No. 702,328.

To all whom, it may concern:

Be it known that I, JEss AnoLPH JENSEN,

a subject of the King of Denmark, residing at Copenhagen, in the Kingdomof Denmark, have invented certain new and useful Improvements inHeating-Stoves; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

The invention relates to an air-feeding dev ice in such stoves as arefurnished with two or more adjustable air-holes. In stoves of this kindthe admission of-air thereto has been regulated hitherto by providingeach of the air-admission holes corresponding with the respective partsof the stove where combustion is desired with a special slide-valve, inusing which a certain gift of observation and technical capacity wererequisite, and consequently it often happened that one airhole receivedtoo much air and the other too little, the combustion being imperfectand unsatisfactory as regards results obtained. According to the presentinvention the quantity of air necessary for the several parts of thecombustion-chamber at each phase of combustion is determined previously,and from this the dimensions and relative positions of the air-supplychannels are calculated, so that in every case a certain quantity of airfor different parts of the stove where combustion is desired and whichvaries considerably according to circumstances corresponds to a certainposition of the edge of the slide-valve by means of which the regulationis effected. The arrangement is such that each air-supply channel iscompletely isolated from the remainder from the point where it begins tothat where combustion takes place. Under this arrangement it may be toocold or too warm in the room; but in all cases the combustion is ascomplete as possible.

In the accompanying drawings, Figure l is a vertical sectional view of astove embodying my invention. Fig. 2 is a front elevation of the doorwith the damper or valve in connection therewith. Fig. 3 is a front viewof the removable case. Fig. 4 is afront view of a modiiied form of casehaving three openings. Fig. 5 is a view broken away, showing in verticalsection a stove having three combustion-chambers and in elevation thecase seen in Fig. 4 with a rectangular damper or valve in connectionwith the same. Fig. 6 is a vertical sectional view through one of theair-chambers of the valve-case.

In the construction shown in Figs. l to 3 the regulating edge of theslide-valve is rectilinear, and in the latter construction (shown inFigs. 4 to 6) said edge is set back in the form of steps.

In the drawings, l is the slide-valve; 2, the slide-valve surface, whichcontains the airinlet holes 4. The said holes 4 are large enough toallow for the passage of the estimated maximum of air for combustion forthe particular case. In Figs. l to 3 the outer air-inlet opening 4 runsinto the circular chamber of a case or receiver 5, which is closed atthe back by a part of the stove-door, this part having an openingreturning into the space above the grate,while the inner air-inletopening 4 runs into a similar circular chamber connected by anotheropening with the stove ash-pit, whence the air enters from beneaththrough the grate into the body of fuel. If the regulating edge of thesemicircular slidevalve is straight, the two openings are so placed thatupon the slide-valve being turned from left to right they do not opensimultaneously. Thus the inner air-inlet opening first opens and admitsair beneath the grate. The air is subsequently admitted to both parts ofthe stove where combustion is desired, and

finally only the cross-section ofthe upper airinlet opening is enlarged.Each possible position of the slide-valve within the points l O to 4 onthe scale corresponds to a different stage of combustion. If theregulating edge of the slide-valve is set back step fashion, as in Figs.4 to 6, the edges of the two channels 4 may commence at the same radius.In order that the slide-valve, which turns on a pin or bolt and isretained in position on its seat by means of a spiral spring, may becapable of being adjusted to any position, a

pointer or indicator is attached to the slide valve l, and by means ofthis the position at any time is exactly indicated on a scale on thedoor, which is graduated and furnished with gures. The indicator canalso be placed on the door and the scale on the slidevalve similarly asin Fig. 5. In Fig. l there is a further special characteristic not foundin Fig. 5. The part which contains the airinlet openings consists ofaspecial single piece, which can be easily put in and readily exchangedfor another containing either smaller or larger openings 4 in order toadapt the fire-place to other conditions of draft. The above-mentionedspiral spring presses with one of its ends on the slide-valve. With theother it rests against a nut arranged on the pivot-pin or a disk placedbeneath.

In Figs. 4 to 6 the openings 4 in the surface 2 are rectangular andarranged at the sa'me height adjoining one another, While the slidevalvel, Which is guided straight in any suit able manner, can be pushed alongthe surface 2, tWo spring-plates pressing it to the latter, and isfurnished With openings arranged step fashion to one another and with ahandle for the purpose of operating it. In this case also the slide isfurnished with a scale, While the fixed surface 2 bears the indicator ora mark. The opening 4, moreover, may begin at different heights if theslide has a straight regulating edge.

By means of the arrangement described above an almost perfect combustionWill be effected with any desired supply of air, this being onlyoccasionally and quite accidentally attained by the simultaneousadjustment of several slides at once.

What I claim, and desire to secure by Letters Patent, is-

l. The combination With a stove having a plurality of chambers to whichair is to be fed, of a case provided with air-inlet openings, each incommunication with one of the aforesaid chambers of the stove, and anadjustable damper or valve arranged to control the admission of airthrough the openings in the case, the said valve and openings beingarranged relatively so that the admission of air to the several chambersof the stove and the order in Which the air is admitted will becontrolled by the adjustment of the valve.

2. The combination With a stove having a plurality of chambers to whichair is to be fed, of a case detachably secured to the stove and havingopenings each in communication with one of the aforesaid chambers of thestove, and an adjustable damper or valve arranged to control theadmission of air through the openings in the case, the said valve andopenings being arranged relatively so that the admission of air to theseveral chambers of the stove and the order in which the air is admittedWill be controlled by the adjustment of the valve.

In testimony whereof I have ailixed my signature in presence of twoWitnesses.

JESS ADOLPH JENSEN.

Witnesses:

JULES BLOM, C. L. MENGELBERG.

